If you’re sourcing fabricated metal components, you don’t need to be a welding expert. However, understanding the basic differences between the three main processes helps you ask better questions, avoid specification errors, and get more accurate quotes from the outset. This is where our team here at DB Sheetmetals can help.
MIG (Metal Inert Gas) welding is the most widely used process in sheet metal fabrication. It’s fast, consistent, and well-suited to mild steel and aluminium. Because the wire feed and arc length are controlled automatically, it’s a practical choice for both small batches and higher-volume runs. If your parts need strong, reliable joins without elaborate finishing requirements, MIG is usually the default recommendation.
TIG (Tungsten Inert Gas) welding is slower and more labour-intensive, but produces a cleaner, more precise weld. It’s the process of choice where appearance matters alongside strength, such as stainless steel components, visible joints, or parts destined for sectors like medical or food production where surface finish is non-negotiable. The operator skill required is higher, which is reflected in cost, but for the right application it earns its place.
Spot welding joins two sheets of metal at discrete points using heat generated by electrical resistance. It’s fast, clean, and leaves no filler material, making it a strong option for enclosures, panels, and assemblies where internal joins need to be secure without adding bulk. It works best on thinner sheet metal and is particularly common in higher-volume production environments.
Which Process Is Right for Your Project?
Many fabricated assemblies use more than one process. A metal enclosure might be spot welded for the main body joins and TIG welded where a clean external finish is required. The right approach depends on your material, tolerances, finish requirements, and volumes. Getting that combination right at the specification stage avoids costly rework later.
It’s also worth noting that welding is rarely a standalone decision. Material choice, downstream finishing, and the end-use environment all influence which process is most appropriate. An experienced fabricator will consider all of these factors together rather than defaulting to whatever is quickest.
At DB Sheetmetals, our team offers MIG, TIG, and spot welding services from our workshop in Haverhill, Suffolk. We’ll talk through the options with you before work begins, making sure the process matches the spec rather than the other way around. Whether you need a one-off prototype or a production run, our welding services are built around getting the detail right.
To discuss your requirements, call us on 01440 706218 or email info@dbsheetmetals.co.uk.